* Faces: Flat polygons.
* Edges: Line segments where two faces meet.
* Vertices: Points where three or more edges meet.
Key characteristics of polyhedrons:
* Closed shape: All the faces are connected and form a closed volume.
* Flat faces: The faces are polygons, which are flat figures with straight sides.
* Solid shape: It occupies a definite space.
Examples of polyhedrons:
* Cube: 6 square faces, 12 edges, 8 vertices
* Tetrahedron: 4 triangular faces, 6 edges, 4 vertices
* Pyramid: A base polygon and triangular faces that meet at a point (apex)
* Prism: Two identical base polygons connected by rectangular faces
* Dodecahedron: 12 pentagonal faces, 30 edges, 20 vertices
* Icosahedron: 20 triangular faces, 30 edges, 12 vertices
Note:
* A regular polyhedron has all its faces congruent regular polygons and all its angles equal.
* A convex polyhedron has all its interior angles less than 180 degrees.
* A non-convex polyhedron can have interior angles greater than 180 degrees, also known as a "star polyhedron."
Let me know if you'd like to know more about specific types of polyhedrons!